Sherlock Holmes is a 2009 crime mystery directed by Guy Ritchie and stars Robert Downey Jr. as the legendary detective and Jude Law as his assistant Watson. The weapons were supplied by UK-based movie armourers Bapty and Co. (with stunt versions by Tarver Productions).
The following weapons were used in the film Sherlock Holmes:
WARNING: SPOILERS BELOW!
Webley No. 5 "Express" Revolver
Sherlock Holmes' (Robert Downey Jr.) revolver, though of a style colloquially termed a 'Webley RIC' (after 'Royal Irish Constabulary'), is technically a Webley No.5 'Express' model by the same maker. This was available from the 1880s onwards in either .360 or .38 caliber. Holmes' example has a 4" barrel, an early-style deeply-fluted cylinder (deeper front-to-rear than either the Bulldog or the true RIC), and a contoured frame at the lower edge ahead of the trigger guard. It also features a flattened swivel-type rammer, squared-off butt with lanyard ring, and a nickel finish.
Several characters in the film employ Webley Bulldog Revolvers. Based upon their short 2.5" barrels and lack of a rammer/ejector, those wielded by Dr. John Watson (Jude Law) and American Ambassador Standish (William Hope) are most likely to be No.3 'R.I.C.' models in .442 calibre. These weapons fired a black powder cartridge and were gate loaders, unlike the later and more memorable "top break" Webleys.
On the carriage ride to the "raid" in the opening scene of the movie, Inspector Lestrade (Eddie Marsan) can be seen loading a Pryse patent revolver. Based upon the form of the front part of the frame, it is most likely the model of 1877, and may be a Webley-built gun, or any number of licencees and copyists.
Enfield Mark II Revolver
A henchman disarmed by Holmes in the opening scene is armed with an Enfield Mk II .476 caliber revolver with its distinctive lower frame, designed to accommodate a cylinder which slides forward to allow reloading.
Belgian Bulldog Pocket Revolver
It appears that Irene Adler (Rachel McAdams) uses a Belgian Pocket Revolver with foldable trigger and what appears to be pearl grips. The screen-used piece is in an unknown caliber, but .38 is likely based on the frame size. An image of the resin/rubber stunt versions used in the movie can be seen at the Tarver Productions website (link below).
C. Sharps Pepperbox
Professor Moriarty (actor's identity unknown) is seen deploying, from a concealed wrist-mounted rig, a (probably reproduction) C. Sharps patent Model 1A four-barreled pepperbox type pistol in .22 rimfire with engraved brass frame. It's interesting, that a Sharps Pepperbox was used in another Holmes movie - Sherlock Holmes: Hound of The Baskervilles in 1988.
The actual police sidearms of 1891 were the older Webley M.P. Model in .450 Adams at least partially supplemented by the Army issue Webley Mark I (in .442 Enfield).
This appears to be a Nagant M1895 Revolver. This would allow the weapon to be effectively suppressed due to the Nagant's gas seal design. However, Holme's homemade supressor seems to be ineffective, as it can be heard booming throughout the apartment, possibly due to the ineffective gas seal of a homemade design. This type of weapon be anachronistic for this film, seeing as it is set in 1891. The prop used was a 1941 Tula-made example.
In the carriage in the beginning, a police constable is briefly seen loading a Winchester Model 1887.